The change is based on concern about pressure on yields due to higher costs related to China and Pride of America's drydock, Seeking Alpha said.
The US-flag ship is the highest earner in the fleet, NCLH management said during the company's early November earnings call. Pride of America will undergo work in the first quarter, and be out of service for 24 days.
The company doesn't currently operate a ship targeted at Chinese travelers but is ramping up to do so in 2017.
Seeking Alpha said Goldman Sachs has a $50 price target for NCLH.
Shares opened at $56.85 on Wednesday and were trading 4% lower in the early afternoon.